I finished Half-Life series recently and what I learnt is if I played it again I would play it with MMod. Its game overhaul, but it tries to keep its origin. It refreshes graphics to suit modern systems in clever way. Some gameplay tweaks show up, but thats it.

If you have never played Half-Life series, but wish to play it one day, I really recommend these mods.

https://store.steampowered.com/app/1761270/HalfLife_MMod/

https://www.moddb.com/mods/hl2-ep2-enhased-mod

Go to https://retroachievements.org/ for emulator. Check out games total players or https://www.vgchartz.com/gamedb/ for inspiration and dont hesitate to play long time classics for selected consoles, handhelds.

I got it for free from that game store everyone hates for all the right reasons.

I have an upcoming trip with an extremely long-haul flight so I'm looking to pack my Steam deck with as much as I can to try to make it more bearable.